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define("dojo/store/JsonRest", ["../_base/xhr", "../json", "../_base/declare", "./util/QueryResults"
], function(xhr, JSON, declare, QueryResults) {
// module:
// dojo/store/JsonRest
// summary:
// The module defines a JSON/REST based object store
return declare("dojo.store.JsonRest", null, {
// summary:
// This is a basic store for RESTful communicating with a server through JSON
// formatted data. It implements dojo.store.api.Store.
constructor: function(/*dojo.store.JsonRest*/ options){
// summary:
// This is a basic store for RESTful communicating with a server through JSON
// formatted data.
// options:
// This provides any configuration information that will be mixed into the store
declare.safeMixin(this, options);
},
// target: String
// The target base URL to use for all requests to the server. This string will be
// prepended to the id to generate the URL (relative or absolute) for requests
// sent to the server
target: "",
// idProperty: String
// Indicates the property to use as the identity property. The values of this
// property should be unique.
idProperty: "id",
// sortParam: String
// The query parameter to used for holding sort information. If this is omitted, than
// the sort information is included in a functional query token to avoid colliding
// with the set of name/value pairs.
get: function(id, options){
// summary:
// Retrieves an object by its identity. This will trigger a GET request to the server using
// the url `this.target + id`.
// id: Number
// The identity to use to lookup the object
// returns: Object
// The object in the store that matches the given id.
var headers = options || {};
headers.Accept = this.accepts;
return xhr("GET", {
url:this.target + id,
handleAs: "json",
headers: headers
});
},
// accepts: String
// Defines the Accept header to use on HTTP requests
accepts: "application/javascript, application/json",
getIdentity: function(object){
// summary:
// Returns an object's identity
// object: Object
// The object to get the identity from
// returns: Number
return object[this.idProperty];
},
put: function(object, options){
// summary:
// Stores an object. This will trigger a PUT request to the server
// if the object has an id, otherwise it will trigger a POST request.
// object: Object
// The object to store.
// options: dojo.store.api.Store.PutDirectives?
// Additional metadata for storing the data. Includes an "id"
// property if a specific id is to be used.
// returns: Number
options = options || {};
var id = ("id" in options) ? options.id : this.getIdentity(object);
var hasId = typeof id != "undefined";
return xhr(hasId && !options.incremental ? "PUT" : "POST", {
url: hasId ? this.target + id : this.target,
postData: JSON.stringify(object),
handleAs: "json",
headers:{
"Content-Type": "application/json",
Accept: this.accepts,
"If-Match": options.overwrite === true ? "*" : null,
"If-None-Match": options.overwrite === false ? "*" : null
}
});
},
add: function(object, options){
// summary:
// Adds an object. This will trigger a PUT request to the server
// if the object has an id, otherwise it will trigger a POST request.
// object: Object
// The object to store.
// options: dojo.store.api.Store.PutDirectives?
// Additional metadata for storing the data. Includes an "id"
// property if a specific id is to be used.
options = options || {};
options.overwrite = false;
return this.put(object, options);
},
remove: function(id){
// summary:
// Deletes an object by its identity. This will trigger a DELETE request to the server.
// id: Number
// The identity to use to delete the object
return xhr("DELETE",{
url:this.target + id
});
},
query: function(query, options){
// summary:
// Queries the store for objects. This will trigger a GET request to the server, with the
// query added as a query string.
// query: Object
// The query to use for retrieving objects from the store.
// options: dojo.store.api.Store.QueryOptions?
// The optional arguments to apply to the resultset.
// returns: dojo.store.api.Store.QueryResults
// The results of the query, extended with iterative methods.
var headers = {Accept: this.accepts};
options = options || {};
if(options.start >= 0 || options.count >= 0){
headers.Range = "items=" + (options.start || '0') + '-' +
(("count" in options && options.count != Infinity) ?
(options.count + (options.start || 0) - 1) : '');
}
if(query && typeof query == "object"){
query = xhr.objectToQuery(query);
query = query ? "?" + query: "";
}
if(options && options.sort){
var sortParam = this.sortParam;
query += (query ? "&" : "?") + (sortParam ? sortParam + '=' : "sort(");
for(var i = 0; i<options.sort.length; i++){
var sort = options.sort[i];
query += (i > 0 ? "," : "") + (sort.descending ? '-' : '+') + encodeURIComponent(sort.attribute);
}
if(!sortParam){
query += ")";
}
}
var results = xhr("GET", {
url: this.target + (query || ""),
handleAs: "json",
headers: headers
});
results.total = results.then(function(){
var range = results.ioArgs.xhr.getResponseHeader("Content-Range");
return range && (range=range.match(/\/(.*)/)) && +range[1];
});
return QueryResults(results);
}
});
});
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